Small aperture multifocal

Details Small aperture multifocal Small aperture multifocal

1989-04-19

1992-06-16

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351168, 359565, 359569, 359571, 359575, 623 6, G02C 704, G02B 2744, A61F 216

Patent

active

051219808

ABSTRACT:
An optical device suitably employable in intraocular and contact lenses that employs a phase zone plate of a Cohen lens design that relies on a small number of zones to provide multifocal images.

REFERENCES:
Genovese et al; "Phase Plate Lens for a Multiple Image System"; IBM Tech. Discl. Bulletin; vol. 8, No. 12; May 1966; pp. 1796-1797.

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